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Atomic Structure of Actinium and Holmium


Atomic Structure of Holmium and Actinium


Atomic Properties

Atomic Number
89   
29
67   
99+

Electron Configuration
[Rn] 6d1 7s2   
[Xe] 4f11 6s2   

Crystal Structure
Face Centered Cubic (FCC)   
Hexagonal Close Packed (HCP)   

Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100   
HCP-Crystal-Structure-of-Holmium.jpg#100   

Atom
  
  

Number of Protons
89   
29
67   
99+

Number of Neutrons
138   
16
98   
34

Number of Electrons
89   
29
67   
99+

Radius of an Atom
  
  

Atomic Radius
195.00 pm   
7
176.00 pm   
18

Covalent Radius
Not Available   
192.00 pm   
17

Van der Waals Radius
Not Available   
216.00 pm   
24

Atomic Weight
227.00 amu   
25
164.93 amu   
99+

Atomic Volume
22.54 cm3/mol   
11
18.70 cm3/mol   
24

Adjacent Atomic Numbers
  
  

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Dysprosium
  

Next Element
Thorium
  
Erbium
  

Valence Electron Potential
38.60 (-eV)   
99+
47.90 (-eV)   
31

Lattice Constant
567.00 pm   
8
357.73 pm   
38

Lattice Angles
π/2, π/2, π/2   
π/2, π/2, 2 π/3   

Lattice C/A Ratio
Not Available   
1.57   
17

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